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Red Hat: RHSA-2011:0305-01 Critical: Samba Denial of Service Issue

red hat
Calendar Grey March 1, 2011
Dist Redhat Esm H88
Essential samba patch released for Red Hat addresses significant vulnerability. Ensure your systems are upgraded immediately to reduce exposure.
Updated samba packages that fix one security issue are now available for Red Hat Enterprise Linux 4, 5, and 6

Solution

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259

Summary

Samba is a suite of programs used by machines to share files, printers, and other information.
A flaw was found in the way Samba handled file descriptors. If an attacker were able to open a large number of file descriptors on the Samba server, they could flip certain stack bits to "1" values, resulting in the Samba server (smbd) crashing. (CVE-2011-0719)
Red Hat would like to thank the Samba team for reporting this issue.
Users of Samba are advised to upgrade to these updated packages, which contain a backported patch to resolve this issue. After installing this update, the smb service will be restarted automatically.

Topics%20covered

Topics Covered

security advisory Red Hat critical DoS samba important

References

https://access.redhat.com/security/cve/CVE-2011-0719 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AS version 4:
Source:
i386: samba-3.0.33-0.30.el4.i386.rpm samba-client-3.0.33-0.30.el4.i386.rpm samba-common-3.0.33-0.30.el4.i386.rpm samba-debuginfo-3.0.33-0.30.el4.i386.rpm samba-swat-3.0.33-0.30.el4.i386.rpm
ia64: samba-3.0.33-0.30.el4.ia64.rpm samba-client-3.0.33-0.30.el4.ia64.rpm samba-common-3.0.33-0.30.el4.i386.rpm samba-common-3.0.33-0.30.el4.ia64.rpm samba-debuginfo-3.0.33-0.30.el4.i386.rpm samba-debuginfo-3.0.33-0.30.el4.ia64.rpm samba-swat-3.0.33-0.30.el4.ia64.rpm
ppc: samba-3.0.33-0.30.el4.ppc.rpm samba-client-3.0.33-0.30.el4.ppc.rpm samba-common-3.0.33-0.30.el4.ppc.rpm samba-common-3.0.33-0.30.el4.ppc64.rpm samba-debuginfo-3.0.33-0.30.el4.ppc.rpm samba-debuginfo-3.0.33-0.30.el4.ppc64.rpm samba-swat-3.0.33-0.30.el4.ppc.rpm
s390: samba-3.0.33-0.30.el4.s390.rpm samba-client-3.0.33-0.30.el4.s390.rpm samba-common-3.0.33-0.30.el4.s390.rpm samba-debuginfo-3.0.33-0.30.el4.s390.rpm samba-swat-3.0.33-0.30.el4.s390.rpm
s390x: samba-3.0.33-0.30.el4.s390x.rpm samba-client-3.0.33-0.30.el4.s390x.rpm samba-common-3.0.33-0.30.el4.s390.rpm samba-common-3.0.33-0.30.el4.s390x.rpm samba-debuginfo-3.0.33-0.30.el4.s390.rpm samba-debuginfo-3.0.33-0.30.el4.s390x.rpm samba-swat-3.0.33-0.30.el4.s390x.rpm
x86_64: samba-3.0.33-0.30.el4.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2011:0305-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:0305.html
Issue date: 2011-03-01

Topic

Updated samba packages that fix one security issue are now available forRed Hat Enterprise Linux 4, 5, and 6.The Red Hat Security Response Team has rated this update as havingimportant security impact. A Common Vulnerability Scoring System (CVSS)base score, which gives a detailed severity rating, is available from theCVE link in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat critical DoS samba important

Relevant Releases Architectures

RHEL Desktop Workstation (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64

Red Hat Enterprise Linux Desktop version 4 - i386, x86_64

Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

Bugs Fixed

678328 - CVE-2011-0719 Samba unsafe fd_set usage

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